132714 - The DELLA proteins influence the expression of cytokinin biosynthesis and response genes during nodulation.pdf (2.18 MB)
The DELLA proteins influence the expression of cytokinin biosynthesis and response genes during nodulation
journal contribution
posted on 2023-05-20, 03:44 authored by Dolgikh, AV, Kirienko, AN, Tikhonovich, IA, Eloise FooEloise Foo, Dolgikh, EAThe key event that initiates nodule organogenesis is the perception of bacterial signal molecules, the Nod factors, triggering a complex of responses in epidermal and cortical cells of the root. The Nod factor signaling pathway interacts with plant hormones, including cytokinins and gibberellins. Activation of cytokinin signaling through the homeodomain-containing transcription factors KNOX is essential for nodule formation. The main regulators of gibberellin signaling, the DELLA proteins are also involved in regulation of nodule formation. However, the interaction between the cytokinin and gibberellin signaling pathways is not fully understood. Here, we show in Pisum sativum L. that the DELLA proteins can activate the expression of KNOX and BELL transcription factors involved in regulation of cytokinin metabolic and response genes. Consistently, pea la cry-s (della1 della2) mutant showed reduced ability to upregulate expression of some cytokinin metabolic genes during nodulation. Our results suggest that DELLA proteins may regulate cytokinin metabolism upon nodulation.
Funding
Australian Research Council
History
Publication title
Frontiers in Plant ScienceVolume
10Article number
432Number
432Pagination
1-13ISSN
1664-462XDepartment/School
School of Natural SciencesPublisher
Frontiers Research FoundationPlace of publication
SwitzerlandRights statement
Copyright 2019 Dolgikh, Kirienko, Tikhonovich, Foo and Dolgikh. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/Repository Status
- Open